The SS AMERICAN MARINER is ready to load the cargo listed in table ST-0038 below. There is already 6422 tons of cargo on board with a KG of 26.6 feet. Use the white pages of the Stability Data Reference Book to determine the final KG of all the cargo after loading is completed.
• Use the combined KG formula for adding weights: ( KG_{final} = \frac{W_{existing} \times KG_{existing} + W_{added} \times KG_{added}}{W_{total}} ) • From the white pages of the Stability Data Reference Book, you must look up the vertical centers of gravity (KG) for each specific hold and deck location listed (No. 1 Third Deck, No. 2 Second Deck, etc.). • Be careful to sum the total added weight and its total moment before combining with the initial ship condition.
• What is the total weight you are adding, based on all the cargo spaces listed in the table? Double-check your arithmetic. • For each stowage location, what KG value does the white pages give you, and how do you convert that into a moment for that particular weight? • After you combine the initial ship’s weight and moment with the new cargo weight and moment, is the final KG higher or lower than the original 26.6 feet? Does that trend make sense based on where you loaded the cargo (higher or lower decks)?
• Verify you have included every cargo item in the table and not missed any line when summing weight or moments. • Verify that all KG values are taken from the correct column and frame range for each hold/deck in the Stability Data Reference Book. • Before choosing an answer, recompute total displacement and total moment and check that ( KG_{final} = \frac{\text{Total Moment}}{\text{Total Displacement}} ) matches one of the choices.
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